Integrating IR detector imaging systems

Details Integrating IR detector imaging systems Integrating IR detector imaging systems

1981-08-25

1984-04-17

Howell, Janice A.

Radiant energy

Infrared-to-visible imaging

Including detector array

250338, G01J 100, H01J 3149

Patent

active

044437013

ABSTRACT:
An integrating IR detector array for imaging is provided in a hybrid circuit with InSb mesa diodes (1, 2 . . . 128) in a linear array, a single J-FET preamplifier (30) for readout, and a silicon integrated circuit multiplexer (34). A reset switch (32) is also provided to reset (charge) all of the diodes to a predetermined level at the end of each line scan. Thin film conductors in a fan-out pattern deposited on an Al.sub.2 O.sub.3 substrate (42) connect the diodes to the multiplexer, and thick film conductors also connect the reset switch and preamplifier to the multiplexer. Two-phase clock pulses (.phi..sub.1 and .phi..sub.2) are applied with a logic return signal to the multiplexer through a triax comprised of three thin film conductors deposited one over the other with silicate glass insulation between layers. A lens (14) focuses a scanned image onto the diode array for horizontal read out one line at a time while a scanning mirror (22) provides vertical scan. A cooler (20) maintains the hybrid circuit at a very low (liquid nitrogen) temperature.

REFERENCES:
patent: 3806729 (1974-04-01), Caywood
patent: 3808435 (1974-04-01), Bate et al.
patent: 4054797 (1977-10-01), Milton et al.
patent: 4363963 (1982-12-01), Ando

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